D-Link DNR Series vs Dahua Ultra Series comparison

Stream, Record and Playback – Simultaneously record video, view live or playback recorded video from up to four mydlink cameras
Customize Your Storage– Securely store camera video on up to two attached USB external hard drives (bring your own drives – up to 4 TB each)
Trigger-Based Recording– Motion or schedule based recording of high-quality video and audio
Easy to Set Up – Quick and easy setup with auto-camera discovery
Remote & Local Access – Free mydlink View app for remote access and the mydlink web portal for local viewing

Dahua's next generation network video recorder offers unparalleled
recording technology for IP video surveillance applications. For
applications where details are critical for identification, this
enterprise-level NVR provides a powerful Intel processor with up to 4K
resolution. Additionally, the NVR features a mouse shortcut operation
menu, remote management and control, centre storage, edge storage,
and back up storage.
This NVR is ideal for a wide range of applications such as public safety,
transportation stations, government institutions, hotel resorts, shopping
malls, city centers, and financial institutions, where demand expansion
flexibility, high reliability and centralized storage management.
The NVR is compatible with numerous third-party devices making it
the perfect solution for surveillance systems with or without a video
management system (VMS). Its open architecture supports multi-user
access and is compatible with ONVIF 2.4, enabling interoperability when
combined with 4K cameras.